The Local Government Ombudsman (LGO) has published its review of local government complaints for 2013/14.

http://www.lgo.org.uk/news/2014/jul/ombudsman-publishes-local-authority-complaint-statistics-new-report/

This year, out of a total of 20,306 complaints, the LGO registered 18,436 new complaints and enquiries specifically about local authorities. In comparison to the previous year:

complaints about benefits and tax increased by 26%